English: Thai Sign Language (ThaiSL), the official sign language of Thailand, uses fingerspelling analogous to that of American Sign Language (ASL), but it's a little more complicated since Thai script contains up to 42 consonant letters in everyday life (plus 2 obsolete letters), therefore some letters have been modified or extended to fit the entire number of Thai letters.

Thai fingerspelling was invented by Khunying Kamala Krairiksh in 1952 with an ASL interpreter, Dr.Elizabeth Benson, a dean of the Department of Deaf Studies at Gallaudet University, the world's first liberal arts university founded in the United States.

According the information gathered from multiple sources, the Thai fingerspelling (TF) was still not written in Sutton SignWriting (SW) and was not well grouped alphabetically with tables. As a result, Sutthikhun has redesigned previous TF tables to be more clearly categorized and presented with SW, making it easy to compare the differences between each hand gesture as following:

Thai fingerspelling: 42 consonants Written in Sutton SignWriting by Sutthikhun Phaengphongsai (30 Aug 2021)

This table has been designed according to the classification of Thai script and their pronunciation, which is divided into 5 groups by color, 13 columns by hand gesture, and 6 rows by the number of variants per hand gesture. Some letters, such as ง (Ng) that normally coexists with ก (K) and ญ (Y1) that normally coexists with ฉ (Ch), have been moved to the same column as น (N) and ย (Y) respectively to be arranged according to hand gestures. In addition, isolated hand gestures that have no variant have been extracted in the first column, which are color-coded to know which group of letters they are separated from.